# Roof Sheet Calculator

Lay out roofing sheets with overlaps and count purchase sheets.

[Open this tool](https://whatson.pk/roof-sheet-calculator/)

Category: Construction

Roofing sheets overlap, so their listed width is not the width each sheet adds to the roof.

Measure along the slope and enter the sheet profile's usable dimensions and overlaps. The order count should reflect actual cover, not just the nominal sheet area.

## Inputs and controls

* Measurement unit: Feet; Metres; Inches; Centimetres; Millimetres
* Slope length. Allowed range: 0.001 to 100000
* Plane width. Allowed range: 0.001 to 100000
* Identical roof planes. Allowed range: 1 to 100
* Sheet length (ft). Allowed range: 0.1 to 100
* Sheet width (ft). Allowed range: 0.1 to 100
* End overlap (in). Allowed range: 0 to 100
* Side overlap (in). Allowed range: 0 to 100
* Ordering allowance (%). Allowed range: 0 to 100. Added once to the measured requirement.
* Price per sheet (PKR / sheet). Allowed range: 0 to 1000000000. Optional. Enter your own supplier quote.

## How to use

* Choose measurement unit. Enter slope length, plane width and identical roof planes.

* Enter sheet length, sheet width, end overlap, side overlap and ordering allowance.

* Enter price per sheet.

* Select Calculate estimate. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Separating nominal size from effective cover helps you compare profiles without accidentally counting overlap as useful coverage.


## Before relying on the result

Enter measured slope length, not the horizontal footprint. Effective cover depends on your sheet profile.


## Tool limitations

Enter measured slope length, not the horizontal footprint. Effective cover depends on your sheet profile.

## Questions

### Should I enter the horizontal roof length?

Use the measured slope length for the covered direction. A horizontal footprint can be shorter than the surface the sheets must cover.

### What should I check before using Roof Sheet Calculator?

Check Measurement unit, Slope length, Plane width and Identical roof planes. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-01T14:08:57+00:00

This profile describes the tool. It does not execute it or supply a professional certification.